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This is a rendition of one of A. V. Hershey's dot fonts from his 1967 paper "Calligraphy for Computers", the "Cartographic" (sans-serif) font, plus a number of glyphs imported from the "Mathematical" font, as well as many additional glyphs drawn in the same/similar style to the original glyphs. This font actually dates to at least as early as June 1963, as it is featured on some diagrams in Hershey's "The Plotting of Maps on a CRT Printer" paper.